AI Receptionist vs Answering Service: Cost Compared
A human answering service is priced in bundles of calls or minutes. Smith.ai lists $300 to $2,100 per month and Ruby lists $250 to $1,725. An AI receptionist is priced as a small flat fee plus usage: Trexinet is $59 per month plus $0.05 per minute. The billing unit, not the headline price, decides which is cheaper for you.
How are human answering services priced?
Most live answering services sell a monthly bundle. You pick a plan that includes a set number of calls or a set number of minutes, and you pay an overage rate when you go past it. Smith.ai prices by the call: as listed on their pricing page, Starter is $300 per month for 30 calls, Basic is $810 for 90 calls, and Pro is $2,100 for 300 calls, which works out to about $10 per call. Ruby prices by the minute: 50 minutes for $250, 100 minutes for $395, 200 minutes for $720 and 500 minutes for $1,725, which is about $5 per minute.
Both models make sense for the provider. A receptionist's time is the cost, so the service has to sell that time in blocks. The question for you is how well the block matches your real call pattern. A plan sized for a busy month is expensive in a slow one, and a plan sized for a slow month leaks overage fees when the phones light up.
How is an AI receptionist priced?
An AI receptionist does not have a payroll behind each call, so the pricing looks different. Trexinet charges $59 per month plus $0.05 per minute of talk time, with no contract. The flat fee covers the managed setup and ongoing tuning. The per-minute fee covers the calls themselves, so a quiet month costs less than a busy one and there is no bundle to outgrow.
The other difference is what you get for the money. The agent answers every call 24/7, asks the qualifying questions you would ask, books the job on your calendar and texts you a summary. There is no after-hours tier and no holiday surcharge, because the agent does not work shifts.
What do the listed prices look like side by side?
Here are the numbers from each provider's own pricing page, lined up by billing model. The point is not to crown a winner on price alone. It is to show how each model behaves as your call volume changes.
Notice that the two human services are not really comparable to each other either. A per-call plan rewards you for long calls, since a twenty-minute intake costs the same as a two-minute one. A per-minute plan rewards you for short calls. Your call log decides which is better.
| Billing model | Example provider | Listed price | What the unit means for you |
|---|---|---|---|
| Per call (human) | Smith.ai | $300 for 30 calls up to $2,100 for 300 calls, about $10 per call | A wrong number and a booked job cost the same |
| Per minute (human) | Ruby | $250 for 50 minutes up to $1,725 for 500 minutes, about $5 per minute | Long, chatty calls cost more than short ones |
| Flat fee plus per minute (AI) | Trexinet | $59 per month plus $0.05 per minute, no contract | Cost rises only with talk time, no bundle to size |
| Voicemail or the owner's cell | In-house | No invoice | The cost is the jobs that go to the next company on the list |
Why does the billing unit matter more than the headline price?
Trades phones get a lot of calls that never become jobs: wrong numbers, vendors, spam, a customer confirming a time. Under a per-call plan every one of those uses up a call from your bundle at the same price as a real lead. Under a per-minute plan they cost little because they are short. Under a flat-plus-minute AI plan they cost a few cents of talk time.
The reverse is also true. A long, careful intake with an anxious homeowner is exactly the call you want answered well. On a per-call plan that call is a bargain. On a per-minute human plan it is the most expensive call of the day. On an AI plan it is still cheap, but you should check that the agent handles it well, which is a quality question, not a price question.
- Count last month's calls, then count how many were real customer calls
- Estimate total talk minutes from your phone system or carrier report
- Price each model with your own numbers, not with a provider's example
- Add setup fees, overage rates and any after-hours premium to the human plans
- Add the value of calls you currently miss, since that is the hidden line item
When is a human answering service the right answer?
A live receptionist service is the better fit when the call itself needs judgment. Law firms screening potential clients, medical offices working under strict scripts, and businesses whose callers are often upset or grieving usually want a person. If your intake involves negotiation, or if a single mishandled call could cost you a client for life, pay for the human.
It also fits when volume is low and steady enough that a small per-call bundle covers you, and when you want a named team that learns your quirks over months. Some owners simply prefer knowing a person picked up. That preference is worth paying for if the budget allows it.
When is an AI receptionist the better buy?
An AI receptionist fits when the calls are repetitive and time-sensitive: an HVAC unit that quit, a leaking water heater, a lockout, a roof that started dripping during the storm. These callers want two things fast: someone to pick up, and a booked time. The agent does both at any hour and texts you the details, and the cost per call stays low no matter how many come in during a heat wave.
It also fits owners who are currently the answering service themselves. If you are answering on the roof or letting calls go to voicemail from the crawlspace, the comparison is not AI versus a human service. It is AI versus missed calls, and $59 per month plus talk time is a small number against one lost job.
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Frequently asked questions
Is an AI receptionist always cheaper than an answering service?
Usually, on a per-call basis, because there is no receptionist time to pay for. But the honest comparison uses your own call counts and minutes. A very low-volume business on the smallest human plan and a business with very long calls should both run the numbers before assuming.
What counts as a call or a minute on these plans?
Ask each provider. Some count every connected call, including wrong numbers and spam. Some round minutes up. Some charge for outbound callbacks and transfers. Get the definitions in writing before comparing plans, because the definition changes the real price.
Are there setup fees or contracts?
It varies by provider, so check the pricing page and the order form. Trexinet's AI receptionist is $59 per month plus $0.05 per minute with no contract. Human services often have plan minimums and may bill overages at a different rate than the base plan.
Can I use both an AI receptionist and a human service?
Yes. A common setup is the AI agent answering first, booking the routine calls, and handing specific situations to a human or to your on-call tech based on rules you set. This keeps human time for the calls that need it and keeps the human bundle small.
What happens to the calls the AI cannot handle?
A managed setup defines a hand-off rule. The agent can transfer to a number, take a message and text it to you, or flag the call as urgent in the summary. The rule is set with you during setup and adjusted as you listen to real calls together.